grammar Rows;
@parser::members{
    int col;
    public RowsParser(TokenStream input, int col){
        this(input);
        this.col = col;
    }
}
file: (row NL)+;

row
locals [int i=0]
    :(  STUFF
        {
            $i++;
            if( $i == col) System.out.println($STUFF.text);
        }
    )+
;
TAB: '\t' -> skip;
NL: '\r'?'\n';
STUFF: ~[\t\r\n]+;